diff --git a/backend/internal/database/db.go b/backend/internal/database/db.go
index b5e1981..4efba3f 100644
--- a/backend/internal/database/db.go
+++ b/backend/internal/database/db.go
@@ -21,7 +21,7 @@ type Database interface {
 	AddProject(name string, description string, username string) error
 	Migrate(dirname string) error
 	GetProjectId(projectname string) (int, error)
-	AddTimeReport(projectName string, userName string, start time.Time, end time.Time) error
+	AddTimeReport(projectName string, userName string, activityType string, start time.Time, end time.Time) error
 	AddUserToProject(username string, projectname string, role string) error
 	ChangeUserRole(username string, projectname string, role string) error
 	GetAllUsersProject(projectname string) ([]UserProjectMember, error)
@@ -51,8 +51,8 @@ const projectInsert = "INSERT INTO projects (name, description, owner_user_id) S
 const promoteToAdmin = "INSERT INTO site_admin (admin_id) SELECT id FROM users WHERE username = ?"
 const addTimeReport = `WITH UserLookup AS (SELECT id FROM users WHERE username = ?), 
 						ProjectLookup AS (SELECT id FROM projects WHERE name = ?)
-						INSERT INTO time_reports (project_id, user_id, start, end) 
-						VALUES ((SELECT id FROM ProjectLookup), (SELECT id FROM UserLookup), ?, ?);`
+						INSERT INTO time_reports (project_id, user_id, activity_type, start, end) 
+						VALUES ((SELECT id FROM ProjectLookup), (SELECT id FROM UserLookup),?, ?, ?);`
 const addUserToProject = "INSERT INTO user_roles (user_id, project_id, p_role) VALUES (?, ?, ?)" // WIP
 const changeUserRole = "UPDATE user_roles SET p_role = ? WHERE user_id = ? AND project_id = ?"
 
@@ -100,8 +100,8 @@ func (d *Db) GetAllProjects() ([]types.Project, error) {
 	return projects, err
 }
 
-func (d *Db) AddTimeReport(projectName string, userName string, start time.Time, end time.Time) error { // WIP
-	_, err := d.Exec(addTimeReport, userName, projectName, start, end)
+func (d *Db) AddTimeReport(projectName string, userName string, activityType string, start time.Time, end time.Time) error { // WIP
+	_, err := d.Exec(addTimeReport, userName, projectName, activityType, start, end)
 	return err
 }
 
diff --git a/backend/internal/database/db_test.go b/backend/internal/database/db_test.go
index 7650739..3b9f339 100644
--- a/backend/internal/database/db_test.go
+++ b/backend/internal/database/db_test.go
@@ -112,7 +112,7 @@ func TestAddTimeReport(t *testing.T) {
 	var now = time.Now()
 	var then = now.Add(time.Hour)
 
-	err = db.AddTimeReport("testproject", "testuser", now, then)
+	err = db.AddTimeReport("testproject", "testuser", "activity", now, then)
 	if err != nil {
 		t.Error("AddTimeReport failed:", err)
 	}
@@ -137,7 +137,7 @@ func TestAddUserToProject(t *testing.T) {
 	var now = time.Now()
 	var then = now.Add(time.Hour)
 
-	err = db.AddTimeReport("testproject", "testuser", now, then)
+	err = db.AddTimeReport("testproject", "testuser", "activity", now, then)
 	if err != nil {
 		t.Error("AddTimeReport failed:", err)
 	}
diff --git a/backend/internal/database/migrations/0030_time_reports.sql b/backend/internal/database/migrations/0030_time_reports.sql
index 76812a1..7c169c2 100644
--- a/backend/internal/database/migrations/0030_time_reports.sql
+++ b/backend/internal/database/migrations/0030_time_reports.sql
@@ -2,10 +2,12 @@ CREATE TABLE IF NOT EXISTS time_reports (
   id INTEGER PRIMARY KEY,
   project_id INTEGER NOT NULL,
   user_id INTEGER NOT NULL,
+  activity_type TEXT NOT NULL,
   start DATETIME NOT NULL,
   end DATETIME NOT NULL,
   FOREIGN KEY (project_id) REFERENCES projects (id) ON DELETE CASCADE
   FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
+  FOREIGN KEY (activity_type) REFERENCES activity_types (name) ON DELETE CASCADE
 );
 
 CREATE TRIGGER IF NOT EXISTS time_reports_start_before_end
diff --git a/backend/internal/database/migrations/0080_activity_types.sql b/backend/internal/database/migrations/0080_activity_types.sql
new file mode 100644
index 0000000..d984d58
--- /dev/null
+++ b/backend/internal/database/migrations/0080_activity_types.sql
@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS activity_types (
+  name TEXT PRIMARY KEY
+);
+
+INSERT OR IGNORE INTO activity_types (name) VALUES ('Development');
+INSERT OR IGNORE INTO activity_types (name) VALUES ('Meeting');
+INSERT OR IGNORE INTO activity_types (name) VALUES ('Administration');
+INSERT OR IGNORE INTO activity_types (name) VALUES ('Own Work');
+INSERT OR IGNORE INTO activity_types (name) VALUES ('Studies');
+INSErt OR IGNORE INTO activity_types (name) VALUES ('Testing');
\ No newline at end of file